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The unidirectional PS-9 measure only .2″ (5.1 mm) in diamete

The AT871R is a wide-range condenser microphone with a hemi-cardioid (half-space cardioid) polar pattern. It is useful in surface-mounted applications such as high-quality sound reinforcement, professional recording, television, and other demanding sound pickup applications. The AT871R is powered from an external 9V to 52V DC phantom power supply. The microphone element is enclosed in a rugged die-cast case and protected by two layers of perforated steel. The combination of heavy die-cast case and rubber non-slip bottom pad minimizes mechanical coupling of surface vibrations to the microphone.


  • Designed for surface-mount applications requiring high-quality sound pickup

  • Extended frequency response and uniform cardioid (120°) polar pattern

  • Heavy die-cast case and rubber bottom pad minimize coupling of surface vibration to the microphone

  • Self-contained power module

r and .3″ (7.6 mm) in length. Each mic comes with a clothing clip, tie tac and windscreen. Telex PS-9 microphones are ideally suited for broadcast, sound reinforcement and recording applications including vocal and instumental micing.


  • Extremely small and lightweight for inconspicuous placement.

  • Smooth frequency response over the entire audio range.

  • Compatible with Telex and other wireless transmitters for added mobility.